Garment having antistatic capability

ABSTRACT

Provided is a garment that has an antistatic capability and exhibits washing durability without, when producing a woven or knitted fabric, using a conductive fiber at a part that becomes a wearing part of the woven or knitted fabric, and without applying an antistatic treatment to the woven or knitted fabric, but rather by incorporating a conductive fiber into a sewing thread. The garment according to the present invention has a conductive fiber incorporated in a sewing thread (linking thread), and has a frictional charge amount of 0.8 μC or less per garment. The garment preferably has an electric resistance value of 1×104Ω-5×108Ω per 1 cm length of the conductive fiber in a fiber axis direction thereof, and the sewing thread preferably includes the conductive fiber in an amount of 30-100 mass %.

TECHNICAL FIELD

A sewing thread (linking thread) used in sewing clothing items in thepresent invention is a thread in which a synthetic fiber having anantistatic capability and capable of being dyed is used, and the presentinvention also relates to a garment having the antistatic capability byusing the thread.

BACKGROUND ART

Due to a recent improvement of an air conditioning installation,temperature is kept comfortable in a working room, while humidity is setto be low. In the winter, humidity is also low both in and out of aroom.

Static electricity tends to accumulate in a heat-retention clothing forthe winter season as a wearer moves, and electrostatic discharge emergedat the time of undressing leads to an uncomfortable feeling. Thoughsuppressing static electricity by antistatic treatment to clothing itemsis conventionally known, the antistatic function is deteriorated byrepeating washing. Further, though there is also a suppression method byincorporating a fiber having the antistatic capability into a woven orknitted fabric, a fiber having the antistatic capability is a coloredfiber containing carbon, titanium oxide or metallic materials, and evenwhen the fiber is dyed, a woven or knitted fabric having a brilliantcolor can not be obtained. Therefore, a development of a woven orknitted fabric which keeps the antistatic capability withoutdeteriorating a quality of clothing items is required.

In Patent Document 1, a sewing machine thread manufactured by twistingat least one composite yarn which has a structure of covering athermoplastic fiber as a core part with a conductive fiber as a sheathpart is described. However, due to a covering with the sheath partconsisting of the conductive fiber, it lacks homochromy after dying.

In Patent Document 2, a method for obtaining an antistatic clothing bysewing together woven fabrics containing the conductive fiber with athread containing the conductive fiber is described. However, theantistatic capability of a knitted fabric containing the conductivefiber is conventionally known.

PRIOR ART DOCUMENT Patent Documents

-   Patent Document 1: JP2010-255157 A-   Patent Document 2: JP 2015-030934 A

SUMMARY OF THE INVENTION Problem to be Solved by the Invention

The objective of the present invention is to provide a garment having anantistatic capability and washing durability not by using a conductivefiber or incorporating a few amount of the conductive fiber in a partwhich becomes a wearing part when manufacturing a woven or knittedfabric, or not by applying an antistatic treatment on the woven orknitted fabric, but by incorporating the conductive fiber in a sewingthread.

Means for Solving Problem

A summary of the present invention is as follows;

The garment of the present invention is the one in which each woven orknitted fabric part is sewn with a sewing thread containing a conductivefiber, a content of the conductive fiber in the sewing thread is 30 mass%-100 mass %, a content of the conductive fiber in each woven or knittedfabric part is 1 mass % or less, and a frictional charge amount is 0.8μC/garment or less.

In the garment of the present invention, it is preferable that anelectric resistance value is 1×10⁴Ω-5×10⁸Ω per 1 cm length of theconductive fiber in a fiber axis direction.

In the garment of the present invention, it is preferable that a contentof the sewing thread with respect to a total mass of the garment is 2mass %-8 mass %.

In the garment of the present invention, it is preferable that a contentof the conductive fiber with respect to a total mass of the garment is 2mass %-8 mass %.

In the garment of the present invention, it is preferable that thesewing thread is used in at least one part among a shoulder part, asleeve part, a collar part, a side part, an armhole part, a hem part anda cuff part.

In the garment of the present invention, it is preferable that thesewing thread is a spun yarn.

In the garment of the present invention, it is preferable that a singlefiber fineness of the conductive fiber is 1 dtex-15 dtex.

In the garment of the present invention, it is preferable that a fiberlength of a single fiber of the conductive fiber contained in the spunyarn is 30 mm-200 mm.

In the spun yarn in the garment of the present invention, it ispreferable that a yarn count of a single spun yarn has a metric count of20-110, the number of fuzz which is 1 mm or longer in a single spun yarnis 130/m or more, and the spun yarn is two-folded yarn or three-foldedyarn.

In the spun yarn in the garment of the present invention, the number offuzz which is 3 mm or longer is 10/m or more, and the number of fuzzwhich is 5 mm or longer is 1/m or more in the single spun yarn.

In the garment of the present invention, it is preferable that theconductive fiber contains 5 mass %-9 mass % of carbon black or 10 mass%-25 mass % of conductive titanium oxide.

In the garment of the present invention, it is preferable that theconductive fiber is a sheath-core type acrylic fiber containing aconductive material in a core part.

It is preferable that the garment of the present invention is a sweateror a fleece.

The sewing thread of the present invention contains 30 mass %-100 mass %of the conductive fiber.

Effect of the Invention

Since the sewing thread contains the conductive fiber, a garment inwhich static electricity does not accumulate when wearing and undressingthe garment, a frictional charge amount in undressing is 0.8 μC/garmentor less, and then an uncomfortable feeling due to static electricitydecreases can be commercially provided, even if the conductive fiber isless contained in the woven or knitted fabric part.

MODE(S) FOR CARRYING OUT THE INVENTION

The garment of the present invention is the one in which each woven orknitted fabric part is sewn with a sewing thread containing a conductivefiber, a content of the conductive fiber in the sewing thread is 30 mass%-100 mass %, a content of the conductive fiber in each woven or knittedfabric part is 1 mass % or less, and a frictional charge amount is 0.8μC/garment or less.

Normally, a garment is formed by joining a front body, a back body,sleeves and a collar with a sewing thread.

In the present invention, woven or knitted fabric parts mean partscomposing a garment; for example, a front body, a back body, sleeves anda collar.

A sewing thread is often referred to as “a linking thread” and sewing isoften referred to as “linking”. The present invention also includesthese meaning of terms.

Regarding parts to be sewn, a part where a front body and a back bodyare sewn means a “side part” and a “shoulder part”, a part where thebodies and a sleeve are sewn means an “armhole part”, a part where thebodies and a collar are sewn means a “collar part”, a part where asleeve is sewn to be a tubular shape means a “sleeve part”, a part wherea tip end of the sleeve is folded and sewn means a “cuff part”, and alower end of bodies means a “hem part”.

In a case that a content of the conductive fiber with respect to asewing thread is 30 mass % or more, corona discharge from the conductivefiber is sufficiently performed in wearing. Therefore, staticelectricity is hard to accumulate in the garment, and an uncomfortablefeeling due to an electric discharge in undressing can be decreased. Inthis regard, a content of the conductive fiber with respect to thesewing thread is preferably 50 mass % or more, more preferably 80 mass %or more, and most preferably 100 mass %. Since the electricity in asheath-core type conductive fiber is eliminated by corona discharge,increasing a fiber cross-section leads to a capability improvement.Therefore, an increase of a mixture rate of the conductive fiber in aspun yarn has an influence on the effectiveness.

Further, in a case that a content of the conductive fiber with respectto each woven or knitted fabric part is 1 mass % or less, it ispreferable since a color of the conductive fiber does not have aninfluence on a garment. More preferably, a content of the conductivefiber in each woven or knitted fabric part is 0 mass %, i.e. theconductive fiber is not contained.

In a case that a frictional charge amount in the garment is 0.8μC/garment or less, an uncomfortable feeling due to static electricityemerged when undressing the garment can be decreased.

From the above standpoint, the frictional charge amount is morepreferably 0.7 μC/garment or less, and further more preferably 0.6μC/garment or less.

0.6 μC/garment or less of a frictional charge amount is a standard foran antistatic workwear prescribed in JIS T8118 (year 2001).

The conductive fiber used in the sewing thread is not limited inparticular, as far as a frictional charge amount of a garment becomes0.8 μC/garment or less.

Examples of the conductive fiber are; chemical fibers containingconductive materials in the fiber, a fiber in which a surface is coatedwith conductive materials, and metallic fibers.

Among them, chemical fibers with good dyeing affinity and durability,and containing the conductive material in the fiber are preferable.Further, conductive fibers in which a conductive material is containedin an acrylic fiber able to be dyed with cationic dye, which has a goodchromogenic nature, are more preferable.

In the sewing thread of the garment in the present invention, it ispreferable that an electric resistance value of the contained conductivefiber is 1×10⁴Ω-5×10⁸Ω, and 30 mass %-100 mass % of the conductive fiberis contained.

In a case that an electric resistance value of the conductive fiber of1×10⁴Ω or more, it is preferable since conductivity is high and amixture rate in the spun yarn can be lowered, and in a case that anelectric resistance value of the conductive fiber is 5×10⁸Ω or less, itis preferable in light of cost.

From the above standpoint, an electric resistance value of theconductive fiber is more preferably 1×10⁵Ω-5×10⁷Ω.

A preferable content of the sewing thread in a garment is 2 mass %-8mass %, though it changes according to a structure such as a size of aproduct, and presence or absence of sleeves.

In a case that a content of the sewing thread containing the conductivefiber in the garment is 2 mass % or more, it is preferable in light of ahigh electric discharge effect of static electricity and in light ofdecreasing an uncomfortable feeling in undressing. In a case that acontent of the sewing thread containing the conductive fiber in thegarment is 8 mass % or less, it is preferable in light of effectivenessfor cost reduction of sewing products in total. From the abovestandpoint, a content of the sewing thread containing the conductivefiber in a garment is more preferably 3 mass %-6 mass %.

In the garment of the present invention, it is preferable that a contentof the conductive fiber with respect to a total mass of the garment is 2mass %-8 mass %.

In a case that a content of the conductive fiber with respect to thetotal mass of the garment is 2 mass % or more, it is preferable in lightof decreasing an uncomfortable feeling in undressing since the electricdischarge effect of static electricity is high. In a case that a contentof the conductive fiber with respect to a total mass of the garment is 8mass % or less, it is preferable in light of effects of cost reductionof sewing product in total. From the above standpoint, a content of theconductive fiber with respect to a total mass of the garment is morepreferably 3 mass %-6 mass %.

It is preferable that the sewing thread is used in at least one partamong a shoulder part, a side part, an armhole part, a sleeve part, acollar part, and a hem part.

The sewing thread is not limited to the one used for sewing the garmentand included in the garment, and the sewing thread may be sewn to thegarment apart from the sewing thread for sewing the garment.

Among them, the sewing thread is preferably used in at least a sleevepart, a side part, a shoulder part and an armhole part, more preferablyused also in a collar part or a cuff part, and further more preferablyused in all the sewn parts.

The sewing thread is often used at a side part, a shoulder part, asleeve part and a collar part, and it is effective to be used where amovable region is large, such as a side part, a shoulder part and asleeve part.

In the garment of the present invention, it is preferable that thesewing thread to be used is a spun yarn.

The sewing thread is composed of a spun yarn, thereby the conductivefiber can be distributed not only on a surface of the thread but also ina whole thread, and a content of the conductive fiber with respect tothe sewing thread can be changed depending on its frictional chargeamount. Further, since a short fiber is used, the number of end parts inthe conductive fiber increases, and corona discharge can be effectivelyperformed.

It is preferable that a single fiber fineness of the conductive fiber is1 dtex-15 dtex.

In a case that a single fiber fineness of the conductive fiber is 1 dtexor more, a spun yarn count can be increased. In a case that a singlefiber fineness of the conductive fiber is 15 dtex or less, it ispreferable since the strength of the spun yarn manufactured can beimproved. From the above standpoint, a single fiber fineness of theconductive fiber is more preferably 3 dtex-11 dtex.

It is preferable that a fiber length of a single fiber of the conductivefiber is 30 mm-200 mm.

In a case that a fiber length of a single fiber of the conductive fiberis 30 mm or longer, mixing with cotton or other chemical syntheticfibers can be easy. In a case that a fiber length of a single fiber ofthe conductive fiber is 200 mm or shorter, mixing with wool becomespossible, and a spun yarn can be manufactured by using various spinningmethods such as cotton spinning or worsted spinning. In light of ease ofspinning processing, it is more preferable that a single fiber finenessis 3 dtex-11 dtex and a fiber length of a single fiber is 35 mm-120 mm.

In the spun yarn, it is preferable that a yarn count of a single spunyarn is a metric count (NM) of 20-110. A single spun yarn for a sewingthread is manufactured within a range of a metric count of 20-110. In acase of a sweater, it is preferable that a processed yarn obtained bythe two-folded yarn processing after manufacturing a single spun yarn ofa metric count of 20-40 is used. In a case of a fleece, it is preferablethat a processed yarn obtained by the three-folded yarn (three-twistedyarn) processing after manufacturing a single spun yarn of a metriccount of 90-105 is used. As a mixing counterpart in a case of a fleece,it is preferable that a polyester short fiber is used in light of thethread strength of the spun yarn.

Further, in a single spun yarn, it is preferable that the number of fuzzhaving a length of 1 mm or longer is 130/m or more, since coronadischarge from a fiber cross section, which is a characteristic of theconductive fiber, can be sufficiently performed.

It is preferable that an upper limit of the number is 300/m or less inlight of passability in processing steps.

In the garment of the present invention, it is preferable that thenumber of fuzz with a length of 3 mm or longer in a single spun yarn is10/m or more and the number of fuzz with a length of 5 mm or longer is1/m or more.

Within the above range, corona discharge from the fiber cross section,which is a characteristic of the conductive fiber, can be sufficientlyperformed, and it is preferable.

In light of the passability in processing steps, it is preferable thatthe upper limit of the number of fuzz with a length of 3 mm or longer is100/m or less and an upper limit of the number of fuzz with a length of5 mm or longer is 10/m or less.

The number of fuzz can be increased by decreasing the number of twistingof a single spun yarn. It should be noted that, since the strength ofthe thread decreases as the number of twisting decreases, the number oftwisting may be set appropriately to balance the both.

In the garment of the present invention, it is preferable that theconductive fiber is a fiber containing 5 mass %-9 mass % of carbonblack, or 10 mass %-14 mass % of conductive titanium oxide.

The carbon black is preferable since conductive capability of the fibercan be easily increased. A fiber of conductive titanium oxide has lowerconductive capability than the one of carbon black, while it isinconspicuous when it is included in a garment due to its gray color.

It is preferable that the conductive fiber is a sheath-core type acrylicfiber which contains a conductive material in the core part in light ofconductive capability, color, prevention of dropping of the conductivematerial in processing, and possibility of maintaining and enhancingconductivity even though washing is repeated.

(Spun Yarn)

The spun yarn used in the present invention can be obtained by a generalcotton spinning method or a worsted spinning method. Regarding the fiberforming a spun yarn, 30-100 mass % of the conductive fiber, or thesheath-core type acrylic fiber is preferably contained with respect tothe spun yarn and in addition, other fibers are mixed and spun. In thiscase, as a counterpart for mixing, an acrylic fiber or a polyester fiberis preferable to maintain the strength of the thread of the spun yarn.In a case of manufacturing a thread having a metric count of 90 orlarger, a polyester fiber is more preferable as a counterpart formixing.

(Sheath-Core Type Acrylic Fiber)

Preferred Examples in a manufacturing method of the conductive acrylicfiber of the present invention are explained in detail as follows.

In the manufacturing method of the conductive acrylic fiber according tothe present Embodiment, firstly, an undiluted spinning solution for asheath component and an undiluted spinning solution for a core componentare prepared. As an undiluted spinning solution of the sheath component,an organic solvent solution obtained by solving acrylic polymer in anorganic solvent is prepared. As an undiluted spinning solution of thecore component, an organic solvent solution obtained by mixingconductive particles (A) and acrylic polymer (B) so as mass ratio(A)/(B) to be from 4 to 20 and solving the mixture in an organic solventis prepared.

In the present Example, the acrylic polymers used for the undilutedspinning solutions for the sheath component and the core component arenot limited in particular, and general acrylic polymers used inmanufacturing conventional acrylic fibers can be used. In particular,for example, it is preferable to use the acrylic polymer which canexhibit heat shrinkability easily in the heat shrink processing stepafter spinning as explained later. Regarding heat shrinkability bycomposition and relaxation of the acrylic polymer, though depending onthe monomer component to be copolymerized, generally, the lessacrylonitrile content the polymer has, the higher heat shrinkabilitytends to be. Accordingly, it is desirable that a content ofacrylonitrile in the undiluted spinning solution is appropriatelyadjusted so that a predetermined heat shrinkability can be obtained inthe heat shrinking processing step thereafter.

Particularly, regarding the undiluted spinning solution for the sheathcomponent, it is appropriate that a content of acrylonitrile in acrylicpolymer is from 50 mass % to 98 mass %, particularly from 50 mass % to95 mass %. In a case that a content of acrylonitrile is less than 50mass %, original characteristics of acrylic fiber such as dyeingclearness and chromogenic nature can not be effectively exhibited, andother physical properties including thermal characteristics tend to bedeteriorated. Further, to improve solubility and dyeability ofacrylonitrile, it is preferable that acrylonitrile is copolymerized withunsaturated monomers such as acrylic acid ester.

Accordingly, it is preferable that a content of acrylonitrile in thesheath part is from 50 mass % to 98 mass % as described above bycopolymerizing with unsaturated monomer. Thereby, the acrylic fiber canhave excellent dyeing clearness, chromogenic nature and thermalproperties without losing the characteristics which the acrylic fiberoriginally has. It should be noted that, in the present Example,unsaturated monomers with which acrylonitrile is copolymerized is notlimited in particular. However, for example, acrylic acid and acrylicacid esters, methacrylic acid and methacrylic acid esters, vinylacetate, vinyl chloride, vinylidene chloride and the like can be used.

In this case, for manufacturing the acrylic fiber having a sheath-corestructure stably without thread breakage in spinning while suppressingan exposure of the core part to the sheath part it is extremelyimportant to adjust viscosity of the undiluted spinning solution of thesheath component. It is important that solid concentration andtemperature in the undiluted spinning solution of the sheath componentis controlled so as viscosity of the undiluted spinning solution of thesheath component to be 300 poise or less, preferably 150 poise or less.

On the other hand, regarding the undiluted spinning solution of the corecomponent, the conductive particles (A) and the acrylic polymer (B) aremixed so as mass ratio (A)/(B) to be from 4 to 20 and solved in anorganic solvent as described above. By setting the value of the abovemass ratio to be 4 or more, continuous phase of the conductive particlesis stably formed in the acrylic fiber when manufacturing the conductiveacrylic fiber, and the acrylic fiber can have sufficient conductivecapability. In a case that the above mass ratio (A)/(B) exceeds 20,dispersibility of the conductive particles or spinnability of theundiluted spinning solution are deteriorated in spinning, and breakageof the core part is likely to occur when picking up or drawing thecoagulated yarn. Therefore, spinnability as well as conductivity of theacrylic fiber deteriorate.

At this time, it is preferable that the conductive particle contained inthe undiluted spinning solution of the core component is metallic oxidewhose conductivity in a powder form is 10⁻³ S/cm or more and has highwhiteness. As such conductive particles, titanium oxide or zinc oxidecan be preferably used, and in addition, for example, tin oxide, indiumoxide, or titanium oxide in which a surface is covered with tin oxide orzinc oxide can also be used. Further, in order to enhance conductivity,antimony oxide can be used together with tin oxide and indium oxide, andtin oxide, indium oxide, aluminum oxide, potassium oxide, germaniumoxide and the like can be used together with zinc oxide. In this case, aform of the conductive particles contained in the undiluted spinningsolution is not limited in particular. However, it is preferable that,in a case that the particle is granular, mean particle size is 3 μm orsmaller in light of stability in a filtration step of the undilutedsolution and a spinning step in manufacturing the acrylic fiber.

As for the organic solvent to adjust each undiluted spinning solution ofthe above sheath component and the core component, organic solvent suchas dimethylacetamide, dimethylformamide, dimethyl sulfoxide and the likeis preferably used. However, it is not limited in particular, and otherorganic solvents used generally in spinning the acrylic fiber may beselected.

In the present Embodiment, solid concentration and temperature of eachundiluted spinning solution of the above sheath component and the corecomponent are not limited in particular, too. However, when solidconcentration is too low, void is likely to occur in fiber afterspinning, and as a result, it may lead to deterioration of fiberphysical properties or deterioration of conductive capability.Accordingly, it is preferable that solid concentration in the undilutedspinning solution of the sheath component is 5 mass % or higher, andsolid concentration in the undiluted spinning solution of the corecomponent is 30 mass % or higher.

Next, spinning is conducted according to a wet spinning method with asheath-core type spinning nozzle using the undiluted spinning solutionsof the sheath component and of the core component prepared as above,setting a proportion between the sheath part and the core part so as acontent of the conductive particles contained in the acrylic fiber to befrom 5 mass % to 15 mass %. In spinning, in a case that a content of theconductive particles contained in the fiber is less than 5 mass %,targeted excellent conductive capability can not be added to the acrylicfiber since the conductive particles are a few. On the other hand, in acase that a content of the conductive particles is beyond 15 mass %,there occurs a problem that the usage of a product is limited since thefiber whiteness is inferior when manufacturing the conductive acrylicfiber.

It should be noted that, the wet spinning method can be conducted in thesame manner as the method used generally in manufacturing theconventional acrylic fiber. For example, spinning can be conducted byextruding the undiluted spinning solution of the sheath component andthe core component from the sheath-core type spinning nozzle into thecoagulated liquid composed of the organic solvent and water, andsolidifying.

At this time, as the sheath-core type spinning nozzle, it is preferablethat a spinning nozzle having 3000 holes or more, particularly 5000holes or more is used. The spinning is conducted by using such asheath-core type spinning nozzle having 3000 holes or more, thereby theconductive acrylic fiber can be manufactured with extremely highproductivity.

Thereafter, for the coagulated yarn obtained by the above wet spinning,each processing such as drawing, applying desolventizing agent and oilagent, drying and densification and the like is applied, then heatshrink processing is conducted in which the coagulated yarn is shrunk atshrink rate from 30% to 50%. The processing method and the processingcondition in each processing of drawing, applying the desolventizingagent and oil agent, drying and densification and the like is notlimited in particular and can be changed appropriately if necessary. Forexample, drawing processing can be conducted in hot water at 80° C. orhigher using desolventizing agent. Further, in light of spinningstability and physical properties of the obtained fiber and the like, adraw ratio is preferably set to be 3-10 times and more preferably 4-7times.

EXAMPLE

Hereinafter, the present invention is specifically explained referringto Examples. It should be noted that, evaluation items in Examples aremeasured by the following methods.

(Measuring Method for the Electric Resistance Value of a Single Fiber)

The conductive acrylic fibers were bonded to metal monads whiledistancing at precisely 1 cm intervals with silver paste (“DOTITE”manufactured by Fujikura Kasei Co., Ltd.). DC voltage of 1000 V isapplied between the metal monads under the atmosphere of temperature of20° C. and relative moisture of 40 RH %. Then the resistance valuebetween the metal monads was measured (“SM-8210” manufactured by formerToa Dempa Co., LTd.).

(Measuring Method for Frictional Charge Amount)

A product used in measurement was washed five times repeatedly by JISL217 106 method, rinsed with injected water for 20 minutes, then tumbledried.

A frictional charge amount of the washed product was measured based onJIS T8118 method.

(Measuring Method for the Number of Fuzz)

The fuzz in the spun yarn was measured based on JIS L1095 9.22.2 Bmethod.

Example 1

A spun yarn was manufactured by putting 100 mass % of conductivesheath-core type acrylic fiber (ET10 manufactured by Mitsubishi RayonCo. Ltd., fineness: 3.3 dtex, fiber length: 38 mm) into a machine for acotton spinning step. The conductive sheath-core type acrylic fibercontains conductive titanium oxide in the core part, and a content ofconductive titanium oxide with respect to a total fiber is 12 mass %. Atthis time, since a single fiber strength is weak, the single fiberbreakage occurs according to a draw ratio and the spinning rate in eachstep, which leads to the possibility of fray occurrence. Therefore, thespinning rate of a carding machine is set to be 40 m/minute or lower anda draw ratio of a draw frame is set to be 8 times. Spinning of thesingle spun yarn was conducted with a metric count of 32 and the numberof twisting of 630 times/m in a spinning frame. As a sensor formeasuring yarn evenness used in rolling the single spun yarn, not anormal capacitance method but an optical method was adopted. After thesingle spun yarn was manufactured, a doubling step was conducted, andS-twisting was conducted for 400 times/m as the final twist with atwisting machine to make it two-folded yarn. Thus the sewing thread Awas manufactured.

Separately, a knitted fabric of rib knitting structure with 12G wasmanufactured by using two-folded yarn with a yarn count of 2/32 bymetric count made of 100% of wool.

Then, a round neck sweater was manufactured by using the sewing thread Aand the knitted fabric. The sewn parts at which the sewing thread A wasused were a sleeve part, a side part, a shoulder part, an armhole partand a collar part.

The sweater was dyed after sewn with black color and a black sweater wasobtained. Then, a frictional charge amount of the black sweater wasmeasured. The composition of the garment is shown in Table 1 and theevaluation result is shown in Table 2.

Example 2

A pink V neck sweater was obtained in the same manner as Example 1except that a V-neck sweater was manufactured, and the dyeing after sewnwas performed with a pale color, i.e. pink.

A frictional charge amount of the pink sweater was measured. Thecomposition of the garment is shown in Table 1 and the evaluation resultis shown in Table 2.

Example 3

A sweater was obtained in the same manner as Example 1 except that thesewing thread A was used for sewing a sleeve part, a side part, ashoulder part and an armhole part, and as for sewing a collar part, asewing thread not containing the conductive fiber was used instead ofthe sewing thread A, as shown in Table 1. The evaluation result is shownin Table 2.

Example 4

As shown in Table 1, a sweater was obtained in the same manner asExample 1 except that the sewing thread A was used for sewing a sleevepart, a side part, a shoulder part, an armhole part and a cuff part. Theevaluation result is shown in Table 2.

Example 5

As shown in Table 1, a sweater was obtained in the same manner asExample 1 except that the sewing thread A was used for sewing a sleevepart, a side part, a shoulder part, an armhole part and a cuff part, aname tag with a size of 1 cm by 5 cm was sewn to an upper part of theback body with the sewing thread A, and dyeing after sewn was conductedwith navy blue color. The evaluation result was shown in Table 2.

Example 6

A spun yarn B was manufactured in the same manner as Example 1 exceptthat a content of conductive titanium oxide with respect to the totalfiber was 20 mass %.

Then, a round neck sweater was manufactured in the same manner asExample 1 except that the spun yarn B was used in a sleeve part, a sidepart, a shoulder part and an armhole part. The composition of thegarment is shown in Table 1 and the evaluation result is shown in Table2.

Comparative Example 1

A black sweater was obtained in the same manner as Example 1 except thatinstead of the conductive fiber in Example 1, non-conductive acrylicfiber (V 17, manufactured by Mitsubishi Rayon Co., Ltd., single fiberfineness: 3.3 dtex, fiber length: 38 mm) was used.

Then, a frictional charge amount of the black sweater was measured. Thecomposition of the garment is shown in Table 1 and the evaluation resultis shown in Table 2.

TABLE 1 Conductive fiber Sweater Electric Single Sewing thread Contentof resistance fiber Fiber Mixture counductive value fineness length rateCount Parts at which sewing thread fiber Ω dtex mm Fiber used mass % NMA or B is used mass % Example 1 5 × 10⁵ 3.3 38 Conductive fiber 100 2/32Sleeve portion, Side portion, 3.6 Shoulder portion, Armhole portion,Collar portion Example 2 5 × 10⁵ 3.3 38 Conductive fiber 100 2/32 Sleeveportion, Side portion, 4.0 Shoulder portion, Armhole portion, Collarportion Example 3 5 × 10⁵ 3.3 38 Conductive fiber 100 2/32 Sleeveportion, Side portion, 4.0 Shoulder portion, Armhole portion Example 4 5× 10⁵ 3.3 38 Conductive fiber 100 2/32 Sleeve portion, Side portion, 4.5Shoulder portion, Armhole portion, Cuff portion Example 5 5 × 10⁵ 3.3 38Conductive fiber 100 2/32 Sleeve portion, Side portion, 4.5 Shoulderportion, Armhole portion, Cuff portion, Name tag Example 6 1.8 × 10⁴  3.3 38 Conductive fiber 100 2/32 Sleeve portion, Side portion, 3.4Shoulder portion, Armhole portion Comparative Acrylic fiber notcontaining Acrylic fiber 100 2/32 — 0 Example 1 conductive fiber

TABLE 2 Frictional charge amount Friction cloth Friction cloth Number offuzz (acryl) (nylon) 1 mm or longer 3 mm or longer 5 mm or longerμC/garment μC/garment number/m number/m number/m Example 1 0.39 0.39 18315 2 Example 2 0.56 0.53 167 13 2 Example 3 0.5 0.73 170 15 2 Example 40.42 0.74 180 14 2 Example 5 0.53 0.39 165 15 2 Example 6 0.21 0.27 17515 3 Comparative 1.40 0.89 120 10 1 Example 1

1. A garment in which each woven or knitted fabric part is sewn with asewing thread containing a conductive fiber, wherein a content of theconductive fiber in the sewing thread is 30 mass %-100 mass %, a contentof the conductive fiber in each woven or knitted fabric part is 1 mass %or less, and a frictional charge amount is 0.8 μC/garment or less. 2.The garment according to claim 1, wherein an electric resistance valueis 1×10⁴Ω-5×10⁸Ω per 1 cm length of the conductive fiber in a fiber axisdirection.
 3. The garment according to claim 1, wherein a content of thesewing thread with respect to a total mass of the garment is 2 mass %-8mass %.
 4. The garment according to claim 1, wherein a content of theconductive fiber with respect to a total mass of the garment is 2 mass%-8 mass %.
 5. The garment according to claim 1, wherein the sewingthread is used in at least one part among a shoulder part, a sleevepart, a collar part, a side part, an armhole part, a hem part and a cuffpart.
 6. The garment according to claim 1, wherein the sewing thread isa spun yarn.
 7. The garment according to claim 1, wherein a single fiberfineness of the conductive fiber is 1 dtex-15 dtex.
 8. The garmentaccording to claim 6, wherein a fiber length of a single fiber of theconductive fiber contained in the spun yarn is 30 mm-200 mm.
 9. Thegarment according to claim 6, wherein a yarn count of a single spun yarnhas a metric count of 20-110, the number of fuzz which is 1 mm or longerin a single spun yarn is 130/m or more.
 10. The garment according toclaim 9, wherein the number of fuzz which is 3 mm or longer is 10/m ormore, and the number of fuzz which is 5 mm or longer is 1/m or more inthe single spun yarn.
 11. The garment according to claim 6, wherein thespun yarn is two-folded yarn or three-folded yarn.
 12. The garmentaccording to claim 1, wherein the conductive fiber contains 5 mass %-9mass % of carbon black or 10 mass %-25 mass % of conductive titaniumoxide.
 13. The garment according to claim 1, wherein the conductivefiber is a sheath-core type acrylic fiber containing a conductivematerial in a core part.
 14. The garment according to claim 1, whereinthe garment is a sweater or a fleece.
 15. A sewing thread containing 30mass %-100 mass % of the conductive fiber.